Fix/update several HTML links (#33539)

packages/flutter/lib/src/foundation/bitfield.dart

@@ -4,7 +4,7 @@
 
 /// The largest SMI value.
 ///
-/// See <https://www.dartlang.org/articles/numeric-computation/#smis-and-mints>
+/// See <https://dart.dev/articles/numeric-computation/#smis-and-mints>
 ///
 /// When compiling to JavaScript, this value is not supported since it is
 /// larger than the maximum safe 32bit integer.
@@ -35,7 +35,7 @@ class BitField<T extends dynamic> {
   final int _length;
   int _bits;
 
-  static const int _smiBits = 62; // see https://www.dartlang.org/articles/numeric-computation/#smis-and-mints
+  static const int _smiBits = 62; // see https://dart.dev/articles/numeric-computation/#smis-and-mints
   static const int _allZeros = 0;
   static const int _allOnes = kMaxUnsignedSMI; // 2^(_kSMIBits+1)-1
 

packages/flutter/lib/src/foundation/debug.dart

@@ -19,8 +19,8 @@ import 'print.dart';
 /// override [debugPrint] themselves and want to check that their own custom
 /// value wasn't overridden by a test.
 ///
-/// See [https://docs.flutter.io/flutter/foundation/foundation-library.html] for
-/// a complete list.
+/// See [the foundation library](foundation/foundation-library.html)
+/// for a complete list.
 bool debugAssertAllFoundationVarsUnset(String reason, { DebugPrintCallback debugPrintOverride = debugPrintThrottled }) {
   assert(() {
     if (debugPrint != debugPrintOverride ||

packages/flutter/lib/src/gestures/debug.dart

@@ -54,8 +54,8 @@ bool debugPrintRecognizerCallbacksTrace = false;
 /// This function is used by the test framework to ensure that debug variables
 /// haven't been inadvertently changed.
 ///
-/// See [https://docs.flutter.io/flutter/gestures/gestures-library.html] for
-/// a complete list.
+/// See [the gestures library](gestures/gestures-library.html) for a complete
+/// list.
 bool debugAssertAllGesturesVarsUnset(String reason) {
   assert(() {
     if (debugPrintHitTestResults ||

packages/flutter/lib/src/material/scaffold.dart

@@ -1193,7 +1193,7 @@ class Scaffold extends StatefulWidget {
       'There are several ways to avoid this problem. The simplest is to use a Builder to get a '
       'context that is "under" the Scaffold. For an example of this, please see the '
       'documentation for Scaffold.of():\n'
-      '  https://docs.flutter.io/flutter/material/Scaffold/of.html\n'
+      '  https://api.flutter.dev/flutter/material/Scaffold/of.html\n'
       'A more efficient solution is to split your build function into several widgets. This '
       'introduces a new context from which you can obtain the Scaffold. In this solution, '
       'you would have an outer widget that creates the Scaffold populated by instances of '
@@ -1236,7 +1236,7 @@ class Scaffold extends StatefulWidget {
         'There are several ways to avoid this problem. The simplest is to use a Builder to get a '
         'context that is "under" the Scaffold. For an example of this, please see the '
         'documentation for Scaffold.of():\n'
-        '  https://docs.flutter.io/flutter/material/Scaffold/of.html\n'
+        '  https://api.flutter.dev/flutter/material/Scaffold/of.html\n'
         'A more efficient solution is to split your build function into several widgets. This '
         'introduces a new context from which you can obtain the Scaffold. In this solution, '
         'you would have an outer widget that creates the Scaffold populated by instances of '

packages/flutter/lib/src/painting/debug.dart

@@ -34,8 +34,8 @@ HttpClientProvider debugNetworkImageHttpClientProvider;
 /// This function is used by the test framework to ensure that debug variables
 /// haven't been inadvertently changed.
 ///
-/// See <https://docs.flutter.io/flutter/rendering/painting-library.html> for
-/// a complete list.
+/// See [the painting library](painting/painting-library.html) for a complete
+/// list.
 ///
 /// The `debugDisableShadowsOverride` argument can be provided to override
 /// the expected value for [debugDisableShadows]. (This exists because the

packages/flutter/lib/src/painting/gradient.dart

@@ -64,7 +64,7 @@ _ColorsAndStops _interpolateColorsAndStops(
 ///
 /// See also:
 ///
-///  * [Gradient](https://api.flutter.dev/flutter/dart-ui/Gradient-class.html), the class in the [dart:ui] library.
+///  * [Gradient](dart-ui/Gradient-class.html), the class in the [dart:ui] library.
 ///
 @immutable
 abstract class Gradient {

packages/flutter/lib/src/painting/strut_style.dart

@@ -46,7 +46,7 @@ import 'text_style.dart';
 ///
 /// See also:
 ///
-///  * [StrutStyle](https://api.flutter.dev/flutter/dart-ui/StrutStyle-class.html), the class in the [dart:ui] library.
+///  * [StrutStyle](dart-ui/StrutStyle-class.html), the class in the [dart:ui] library.
 ///
 /// ### Fields and their default values.
 

packages/flutter/lib/src/rendering/debug.dart

@@ -243,8 +243,8 @@ void debugPaintPadding(Canvas canvas, Rect outerRect, Rect innerRect, { double o
 /// This function is used by the test framework to ensure that debug variables
 /// haven't been inadvertently changed.
 ///
-/// See <https://docs.flutter.io/flutter/rendering/rendering-library.html> for
-/// a complete list.
+/// See [the rendering library](rendering/rendering-library.html) for a complete
+/// list.
 ///
 /// The `debugCheckIntrinsicSizesOverride` argument can be provided to override
 /// the expected value for [debugCheckIntrinsicSizes]. (This exists because the

packages/flutter/lib/src/rendering/flex.dart

@@ -705,7 +705,7 @@ class RenderFlex extends RenderBox with ContainerRenderObjectMixin<RenderBox, Fl
             ErrorDescription(
               'If this message did not help you determine the problem, consider using debugDumpRenderTree():\n'
               '  https://flutter.dev/debugging/#rendering-layer\n'
-              '  http://docs.flutter.io/flutter/rendering/debugDumpRenderTree.html'
+              '  http://api.flutter.dev/flutter/rendering/debugDumpRenderTree.html'
             ),
             describeForError('The affected RenderFlex is', style: DiagnosticsTreeStyle.errorProperty),
             DiagnosticsProperty<dynamic>('The creator information is set to', debugCreator, style: DiagnosticsTreeStyle.errorProperty)

packages/flutter/lib/src/rendering/layer.dart

@@ -297,9 +297,9 @@ class PictureLayer extends Layer {
 ///
 /// See also:
 ///
-///  * <https://docs.flutter.io/javadoc/io/flutter/view/TextureRegistry.html>
+///  * <https://api.flutter.dev/javadoc/io/flutter/view/TextureRegistry.html>
 ///    for how to create and manage backend textures on Android.
-///  * <https://docs.flutter.io/objcdoc/Protocols/FlutterTextureRegistry.html>
+///  * <https://api.flutter.dev/objcdoc/Protocols/FlutterTextureRegistry.html>
 ///    for how to create and manage backend textures on iOS.
 class TextureLayer extends Layer {
   /// Creates a texture layer bounded by [rect] and with backend texture

packages/flutter/lib/src/rendering/texture.dart

@@ -30,9 +30,9 @@ import 'object.dart';
 ///
 /// See also:
 ///
-///  * <https://docs.flutter.io/javadoc/io/flutter/view/TextureRegistry.html>
+///  * <https://api.flutter.dev/javadoc/io/flutter/view/TextureRegistry.html>
 ///    for how to create and manage backend textures on Android.
-///  * <https://docs.flutter.io/objcdoc/Protocols/FlutterTextureRegistry.html>
+///  * <https://api.flutter.dev/objcdoc/Protocols/FlutterTextureRegistry.html>
 ///    for how to create and manage backend textures on iOS.
 class TextureBox extends RenderBox {
   /// Creates a box backed by the texture identified by [textureId].

packages/flutter/lib/src/scheduler/debug.dart

@@ -53,8 +53,8 @@ bool debugPrintScheduleFrameStacks = false;
 /// This function is used by the test framework to ensure that debug variables
 /// haven't been inadvertently changed.
 ///
-/// See [https://docs.flutter.io/flutter/scheduler/scheduler-library.html] for
-/// a complete list.
+/// See [the scheduler library](scheduler/scheduler-library.html) for a complete
+/// list.
 bool debugAssertAllSchedulerVarsUnset(String reason) {
   assert(() {
     if (debugPrintBeginFrameBanner ||

packages/flutter/lib/src/widgets/animated_list.dart

@@ -174,7 +174,7 @@ class AnimatedList extends StatefulWidget {
       'This can happen when the context provided is from the same StatefulWidget that '
       'built the AnimatedList. Please see the AnimatedList documentation for examples '
       'of how to refer to an AnimatedListState object: '
-      '  https://docs.flutter.io/flutter/widgets/AnimatedListState-class.html \n'
+      '  https://api.flutter.dev/flutter/widgets/AnimatedListState-class.html \n'
       'The context used was:\n'
       '  $context'
     );

packages/flutter/lib/src/widgets/debug.dart

@@ -293,8 +293,7 @@ void debugWidgetBuilderValue(Widget widget, Widget built) {
 /// This function is used by the test framework to ensure that debug variables
 /// haven't been inadvertently changed.
 ///
-/// See [https://docs.flutter.io/flutter/widgets/widgets-library.html] for
-/// a complete list.
+/// See [the widgets library](widgets/widgets-library.html) for a complete list.
 bool debugAssertAllWidgetVarsUnset(String reason) {
   assert(() {
     if (debugPrintRebuildDirtyWidgets ||

packages/flutter/lib/src/widgets/framework.dart

@@ -2581,7 +2581,7 @@ abstract class Element extends DiagnosticableTree implements BuildContext {
   //
   // See also:
   //
-  //  * https://www.dartlang.org/articles/dart-vm/numeric-computation, which
+  //  * https://dart.dev/articles/dart-vm/numeric-computation, which
   //    explains how numbers are represented in Dart.
   @override
   int get hashCode => _cachedHash;
@@ -3250,7 +3250,7 @@ abstract class Element extends DiagnosticableTree implements BuildContext {
           'If you need some sizing information during build to decide which '
           'widgets to build, consider using a LayoutBuilder widget, which can '
           'tell you the layout constraints at a given location in the tree. See '
-          '<https://docs.flutter.io/flutter/widgets/LayoutBuilder-class.html> '
+          '<https://api.flutter.dev/flutter/widgets/LayoutBuilder-class.html> '
           'for more details.\n'
           '\n'
           'The size getter was called for the following element:\n'

packages/flutter/lib/src/widgets/image.dart

@@ -213,7 +213,7 @@ typedef ImageLoadingBuilder = Widget Function(
 ///  * [new Ink.image], which is the preferred way to show an image in a
 ///    material application (especially if the image is in a [Material] and will
 ///    have an [InkWell] on top of it).
-///  * [Image](https://api.flutter.dev/flutter/dart-ui/Image-class.html), the class in the [dart:ui] library.
+///  * [Image](dart-ui/Image-class.html), the class in the [dart:ui] library.
 ///
 class Image extends StatefulWidget {
   /// Creates a widget that displays an image.

packages/flutter/lib/src/widgets/texture.dart

@@ -28,9 +28,9 @@ import 'framework.dart';
 ///
 /// See also:
 ///
-///  * <https://docs.flutter.io/javadoc/io/flutter/view/TextureRegistry.html>
+///  * <https://api.flutter.dev/javadoc/io/flutter/view/TextureRegistry.html>
 ///    for how to create and manage backend textures on Android.
-///  * <https://docs.flutter.io/objcdoc/Protocols/FlutterTextureRegistry.html>
+///  * <https://api.flutter.dev/objcdoc/Protocols/FlutterTextureRegistry.html>
 ///    for how to create and manage backend textures on iOS.
 class Texture extends LeafRenderObjectWidget {
   /// Creates a widget backed by the texture identified by [textureId].